Influence of seascape spatial pattern on the trophic niche of an omnivorous fish

Santos, Rolando O.; James, William R.; Nelson, James A.; Rehage, Jennifer S.; Serafy, Joseph E.; Pittman, Simon J.; Lirman, Diego

doi:10.1002/ecs2.3944

Cited by 8 publications

(9 citation statements)

References 108 publications

(221 reference statements)

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“…White shrimp in Louisiana marshes displayed decreases in biomass, abundance, and body size with decreases in HRI values (James, Santos, Rehage, et al., 2022), and it is possible that seagrass consumers in Florida Bay had a similar response. Additionally, resource distribution influences variability in resource use and competition between species (Lesser et al., 2020; Santos et al., 2022), as well as consumer movement and distribution (Abrahms et al., 2019, 2021; Geary et al., 2020). Changes in species interactions can result in altered food web structure and function and ultimately affect the stability of consumer populations (Dobson et al., 2006; McCann et al., 1998; Melián & Bascompte, 2002; Valladares et al., 2012).…”

Section: Discussionmentioning

confidence: 99%

“…Additionally, pink shrimp was the only species with an IEI value >1 for a basal resource that was unaffected by the die-off (algae, Table 2; Figure 2). The combination of the recovery trajectory of sea- Santos et al, 2022), as well as consumer movement and distribution (Abrahms et al, 2019(Abrahms et al, , 2021Geary et al, 2020).…”

Section: Speciesmentioning

confidence: 99%

“…E-scapes were generated for each species at each basin between 2007 and 2019 (with the exception of 2013, 3 species × 12 years = 36E-scapes). IEI values were combined with habitat cover areas within a landscape foraging unit (grid cell with an area that corresponds to the movement range of the consumer; James,Santos, Rehage, et al, 2022)…”

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confidence: 99%

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Widespread habitat loss leads to ecosystem‐scale decrease in trophic function

James,

Furman,

Rodemann

et al. 2024

Global Change Biology

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Natural and anthropogenic disturbances have led to rapid declines in the amount and quality of available habitat in many ecosystems. Many studies have focused on how habitat loss has affected the composition and configuration of habitats, but there have been fewer studies that investigate how this loss affects ecosystem function. We investigated how a large‐scale seagrass die‐off altered the distribution of energetic resources of three seagrass‐associated consumers with varied resource use patterns. Using long‐term benthic habitat monitoring data and resource use data from Bayesian stable isotope mixing models, we generated energetic resource landscapes (E‐scapes) annually between 2007 and 2019. E‐scapes link the resources being used by a consumer to the habitats that produce those resources to calculate a habitat resource index as a measurement of energetic quality of the landscape. Overall, our results revealed that following the die‐off there was a reduction in trophic function across all species in areas affected by the die‐off event, but the response was species‐specific and dependent on resource use and recovery patterns. This study highlights how habitat loss can lead to changes in ecosystem function. Incorporating changes in ecosystem function into models of habitat loss could improve understanding of how species will respond to future change.

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Section: Discussionmentioning

confidence: 99%

Section: Speciesmentioning

confidence: 99%

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Widespread habitat loss leads to ecosystem‐scale decrease in trophic function

James,

Furman,

Rodemann

et al. 2024

Global Change Biology

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“…were patch density (PD), landscape division (LD), area-weighted mean perimeter to area ratio (AWMPAR) and mean radius of gyration (GYRATE), which have been recommended by others (Sleeman et al, 2005;Santos, Lirman & Pittman, 2016;Santos et al, 2022). All these metrics became larger with increased fragmentation except GYRATE, which decreased with increased fragmentation.…”

Section: Sampling Design To Measure Fragmentationmentioning

confidence: 99%

Don't go breaking apart: Anthropogenic disturbances predict meadow fragmentation of an endangered seagrass

Swadling

West

Gibson

et al. 2022

Aquatic Conservation

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1. Although it is well established that human activities are linked to the loss of seagrasses worldwide, the influence of anthropogenic disturbances on the habitat fragmentation of seagrass meadows is less understood. This information is essential to identify how humans are modifying seascapes and what disturbances pose the greatest risk to seagrasses, which is pertinent given the rapid urbanization occurring in coastal areas. This study examined how the habitat fragmentation of an endangered seagrassPosidonia australis varied in relation to several anthropogenic disturbances (i.e. human population, marine infrastructure, terrestrial run-off and catchment land-usage) within 10 estuaries across 620 km of coastline in New South Wales, Australia.3. When comparing between estuaries, the fragmentation of P. australis meadows was significantly greater in estuaries adjacent to highly populated metropolitan centresgenerally in the Greater Sydney region. At sites within estuaries, the density of boat moorings was the most important predictor of habitat fragmentation, but there was also evidence of higher fragmentation with increased numbers of jetties and oyster aquaculture leases.4. These results suggest that the fragmentation of seagrass meadows will become more pervasive as the human population continues to grow and estuarine development increases. Strategies to mitigate anthropogenic disturbances on seagrass meadow fragmentation could include prohibiting the construction of boat moorings and other artificial structures in areas where seagrasses are present or promoting environmentally friendly designs for marine infrastructure. This knowledge will support ongoing management actions attempting to balance coastal development and the conservation of seagrasses.

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“…The assessment of widespread and patchy habitat such as CDB requires a seascape approach. It is known that the seascape can directly influence the trophic network and the ecosystem functioning (Boström et al, 2011;Abadie et al, 2018;Santos et al, 2022). In the light of that, a seascape approach should be a potential suitable descriptor to assess the quality of an ecosystem (e.g., marine forests, habitat structure, etc.…”

Section: Criticism and Improvement Perspectivesmentioning

confidence: 99%

Ecosystem-based assessment of a widespread Mediterranean marine habitat: The Coastal Detrital Bottoms, with a special focus on epibenthic assemblages

et al. 2023

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IntroductionCoastal detrital bottoms (CDB) are one of the most extensive habitats of the continental shelf worldwide, in the upper levels of the circalittoral zone. Hosting a diverse community structured by sediment grain size, trophic interactions and calcified organisms, CDB exhibit important ecological functions. In the Mediterranean Sea, CDB are constituted by recent elements partly provided by adjacent infralittoral and circalittoral ecosystems. Since the 2010s, the offshore extension of many Marine Protected Areas (MPAs) has resulted in the incorporation of vast areas of CDB, raising the issue of their management. The Marine Strategy Framework Directive (MSFD) has embraced the concept of an ecosystem-based approach involving taking into account the functioning of marine habitats and their related ecosystem services. The purpose of this paper is to propose an ecosystem-based quality index (EBQI) tested on CDB from the north-western Mediterranean Sea, focusing mainly on epibenthic assemblages.MethodsThe first step has been to define a conceptual model of the CDB functioning, including the main trophic compartments and their relative weighting, then to identify appropriate assessment methods and potential descriptors. Twenty-nine sites were sampled along the coast of Provence and French Riviera (Southern France). Study sites were chosen with a view to encompassing a wide range of hydrological conditions and human pressures.ResultsVery well-preserved sites were found in Provence in areas without trawling and terrigenous inputs, while impacted and low-ES sites were located in the vicinity of urbanized areas. The cover of rhodoliths characterizes the seascape and might be an indicator of the good ES of CDB and reduced human pressure. However, the absence of rhodoliths may also be induced by natural phenomena.DiscussionThe EBQI designed for CDB proved representative and useful for a functional assessment based on epibenthic assemblages. However, some descriptors have shown their limitations and should be further explored. We highlight here the priority of establishing an index corresponding to a societal demand (e.g., European Directives, Barcelona convention) as a basis for a broad and large-scale assessment, for practical reasons. We stress the need to better apprehend the role of the macro-infauna and to extend this index over a wider geographical scale.

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Influence of seascape spatial pattern on the trophic niche of an omnivorous fish

Cited by 8 publications

References 108 publications

Widespread habitat loss leads to ecosystem‐scale decrease in trophic function

Widespread habitat loss leads to ecosystem‐scale decrease in trophic function

Don't go breaking apart: Anthropogenic disturbances predict meadow fragmentation of an endangered seagrass

Ecosystem-based assessment of a widespread Mediterranean marine habitat: The Coastal Detrital Bottoms, with a special focus on epibenthic assemblages

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